Factors Influencing Nutritional Intake and Interests in Educational Content of Athletes and Sport Professionals Toward the Development of a Clinician-Supported Mobile App to Combat Relative Energy Deficiency in Sport: Formative Research and a Description of App Functions

影响运动员和体育专业人士营养摄入和教育内容兴趣的因素：开发一款由临床医生支持的移动应用程序以对抗运动中的相对能量不足：形成性研究和应用程序功能描述